REST API URL : https://powerbi-embed-api.azurewebsites.net/api/reports/{ReportId}
on the basis of API return data given below,
{
"type": "report",
"accessToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ2ZXIiOiIwLjIuMCIsIndjbiI6IlBvd2VyQmlBenVyZVNhbXBsZXMiLCJ3aWQiOiJmODFjMTk2Ni1lZGVlLTQxMWItOGY4YS1mODQ0NjAxOWIwNDQiLCJyaWQiOiJjNTJhZjhhYi0wNDY4LTQxNjUtOTJhZi1kYzM5ODU4ZDY2YWQiLCJpc3MiOiJQb3dlckJJU0RLIiwiYXVkIjoiaHR0cHM6Ly9hbmFseXNpcy53aW5kb3dzLm5ldC9wb3dlcmJpL2FwaSIsImV4cCI6MTQ4MzcwNzczMywibmJmIjoxNDgzNzA0MTMzfQ.ALaQfU2d8_jylrj0C_7p2vrgEObG4eIpctnfR-COApQ",
"id": "c52af8ab-0468-4165-92af-dc39858d66ad",
"name": "Retail Analysis",
"webUrl": "https://app.powerbi.com/reports/c52af8ab-0468-4165-92af-dc39858d66ad",
"embedUrl": "https://embedded.powerbi.com/appTokenReportEmbed?reportId=c52af8ab-0468-4165-92af-dc39858d66ad"
}
so the server action return two parameter APP Token & URL,and you already have report id.
Thanks!